4MA1/2FR Jun 2018, Question 16: Mean, Median, Mode and Range
Pearson Edexcel International GCSE Mathematics A 4MA1 · Paper 2FR (Foundation) · Calculator · 2 marks
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The question, in short
Three integers x, 10, y are ordered smallest first; their mean is 11 and range is 7. Find x and y.
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Solution · 2 marks
- 1Mean 11: x + 10 + y = 33, so x + y = 23
- 2Range 7: y − x = 7
- 3Add: 2y = 30, so y = 15
- 4x = 23 − 15 = 8
- 5x = 8, y = 15
Answerx = 8, y = 15
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